Luis F. Castillo Stats & Bio | Mariners Pitcher

About Luis F. Castillo

Luis F. Castillo stands as one of the most formidable starting pitchers in the American League, anchoring the Seattle Mariners' rotation while wearing jersey number 43. Born on March 10, 1995, in Fantino, Dominican Republic, Castillo developed his craft through the professional baseball pipeline rather than the traditional college route, refining his skills from a young age. Standing 6'3" and weighing 212 lbs, he possesses the ideal pitcher's frame, allowing him to generate exceptional velocity and movement on his pitches. Known for his devastating changeup and powerful fastball combination, Castillo consistently challenges hitters at every level of competition. His journey from the Dominican Republic to a prominent role with the Mariners represents both personal determination and extraordinary talent, making him one of Seattle's most trusted arms on the mound.

Updated: Mar 26, 2026